Jean (Alexis) Périer was a French operatic baryton-martin and actor. Although he sang principally within the operetta repertoire, Périer did portray a number of opera roles; mostly within operas by Wolfgang Amadeus Mozart and Giacomo Puccini. His career was almost entirely centered in Paris and he had a long association with the Opéra-Comique. He sang in a large number of world premieres, most notably originating the role of Pelléas in Debussy's Pelléas et Mélisande in 1902. In addition to his opera career, Périer appeared in several films between 1900 and 1938.

Pelléas et Mélisande is an opera in five acts with music by Claude Debussy. The French libretto was adapted from Maurice Maeterlinck's symbolist play of the same name. It premiered at the Salle Favart in Paris by the Opéra-Comique on 30 April 1902; Jean Périer was Pelléas and Mary Garden was Mélisande, conducted by André Messager, who was instrumental in getting the Opéra-Comique to stage the work. It is the only opera Debussy ever completed.